The current structure is both an active lighthouse for navigational purposes and a museum.

The commander was provided with a periscope and a clear acrylic dome for navigational purposes.

It has been relit since 2007 for historical rather than navigational purposes.

In the desert, as on the sea, for navigational purposes, certainly, they have their uses.

The rule is a rough approximation only and should be applied with great caution when used for navigational purposes.

They had only steering jets, now, for all navigational purposes.

In any case, we carry wireless only for navigational purposes.

The charts available were very limited, and not suited for navigational purposes; after all, the facility was hardly navigable.

The theory had been that blues and humpbacks used it to communicate with each other over long distances for navigational purposes.

It's that theoretical line we tie to for navigational purposes.